Hurray, Tickets have arrived today, excited, but also nervous as my car is still in the garage, had head gasket failure, was removed, machined, and put back together on Monday, pretty certain nothing was done incorrectly, however when running up to temp the timing chain snapped!! luckily only on tickover. Off with the head again to investigate, no damage to valves or pistons, guides, pallets and shims. Took cam off to checked valves moved OK. investigation showed jackshaft had seized in bore, evidence of a metalic substance built up on jackshaft at front end where it runs in the bore and burnt in to it, but bore is ok. Weird as oilways are clear in block and on jackshaft, No signs of any gear damage on water pump or teeth damage to water pump drive on jackshaft that could have provided debris. Had to take engine out to drift jackshaft out by removing core plug at gearbox end.
Andy
1980 DHC Cashmere Gold
1981 FHC Persian Aqua Blue
www.andys-tr7.co.uk
http://andystr7blog.blogspot.com
